Manufacture of pneumatic cushioning devices for the elastic suspension of road-vehicles.



` .TNG DE'VCES FR THELASTIC SUSEENSION Y RL'EHCLES.

il Jisri Sreciceiiw @f *im ftent Eet-ente@ @lluly 16, 1912. Applicationfiled. Enne U, 3.911. Serial No. 634.-,163. A y@ L/2 @LC/omit mayconcern.' i covered structure then vuloaiiizing the. 55 "le it knownthat l, Lnoimnn llmmis, a' whole, afterward removing die structure H tof the King of Great Britain, refrom Said mold, and finally removingthefg in London, England, hnreinvented sind core iroin 'the seidflexible and non-eX-f` n new and useful linproveinenls in the nniiectnreor Construction of Pneumatic @.snioning levioes for tlie Elastic Suspennof londTeliioles, and ol which the i'oliq specification,

lieve. bei 'proposed to employ 'Vo ousliiorf: which were lo m vile nandinerte nd olorio, o 'oler forni, ini, and around l1 openings l. tlieannular tlieeesing 'to be lint op on at i 1 l N 1 x 1 I p itn ineens loywinch xt ooulo be 20 en Willi upper end lower cup-like scoured to the reto be ii'isnleted fro Vibration. oli pnenniuiio mieli vices were fittedwith a valve by e inflated, or contained india rubber, fittedrespect-ire parts in one enotner 5111 if. ling which they could o :ininner e listie cese of will. n. faire Wliieliextended lo the exterior.

Reference is Inode my specification "rining part of United States PatentNo. 32.833, dated Fel). 28. 19057 for ntiyibraion pneumatic cushion.

The present invention Consists in 'tlie method or 'process by which aflexible and non-extensible easing for the purposes above ennnier:ited7is inginnfnctured, as heroine-.iter particularly described and claimed.

According to this invention the approximately spherical casing aforesaidis o m4 poseo of an inner lining oi siiiyfo nmterial, suoli as indiarubber, zr "Winding of slring tliereon Coated With indie rubber or timelike, and en exterior, tliiolmess of indizi rubber or the like havingribs around 'the annular edges of tlie two diometrioally oppositeopenings, all vulcanized together.

The process of manufacture of theonsing according to tliis inventionconsists in applying n cover L suitable thin lining mete# rial, suoli asindia rubbeiyeround 4a core; thenivinding a length of string having :Lyulcnniznblo adhesive coating Ao indie rulif ber vor the like over suolicover, then placing the structure in n mold, tlieninsertinfr iodiorubber to fill such mold around suo, i

tensible Casino. y "lrie torni string is intended to include-60 oord,eine, Wire or the like, of any. suitableff materiel9 suoli es sillr7cotton, line`r1,"heinp, i metal or equivalent substances. n lv l ion is'hereinafter more vfullyufA 65 The invent scribed with reference'to 'theaccompanygv i in Whichl is a. sectional ele'vation'of a. c .im .n whichthe string is Wound in the forni r. lielir; around the core romtop tobottoni thereof or yiceyersa; l Fig. 2 is plan of the lower portion oing the coro in position a ing in section, YFig. 3 method of winding thestring upon the core. Fig. l is fr section through a molded casingL 7'5-and a core, constructed to enable the to lie 'wound in n longitudinaldireotiohl over D tile seid core. Upon a suitable sectional core l suolias' is i shown in i2 and ll, there isfapplied e y80 @fr r 2 oit' tliinmateriale-sayindie. rubber suitable to form the lining of the oasingin'di upon 'this cover is Wound the string 3. This 4 string which is in acontinuous length, may" oe Wound, as shown in Figs. 1 and 2,'-i1i' e185helical direction around the' core, or ias: l sliorfn in Fig. 3 it maybe Wound around the core et :in angle to its axis,`and when the' in Y@ore lios neen suiliciently covered by Windin'gf I Tf* the string inone' direction, the direction of 90 Winding isflien changed so"'that thestring lest 'applied' crosses that `previously Wound" non core, sindorrns'a cross Winding 21's shown'.A Theloore l being tlius preparedfitis placed within tlie moldjll endndia' or like vulcanizeble body mteriel5 Irrolded'y in 'to the string surrounding the l'said Core to ille shapeoi` the interior ofthe mold, 'the said body material becomingincorporated with the string 39 so that the string becomesv 100 integralwith 'the vloody material .and'is Wil--l f. eenizedtlierewitli as Wellas tothelining; The core l is Constr noted in any oonyenen or Well knownmanner so that vWhen 'die casing is removed from the mold, the center105 torr example o llie' core can be first ref moved, after which itsother sectional parts' een oe Withdrawn through theeperture etV eitherend of the casing previously oecul pied by the center of said core. l

Fig. -l Ishows a form ot eore adapted for t the winding' ot' the string;in a efmtinnous l length in a longitudinal direction. For this purposethere is provided a hollow central member 7, around which are assembledthe sections S completing the core. lVhen the core, excepting its axisf), has been assemf bled and lthe lining- 2 placed thereover. the]continuons string 3 1s wound so to extend in a longiti'uilinal directionthereon, the string, after passing over the lining,` upon the outside ofthe core, being threaded through the hollow member 7, again passed overthe lining upon the. outside ol the core, and so on until sufficientstring is employed to form the desired reinforcement.' The eore havingthus been prepared, the axis 9 is passed through the. hollow member 7,and the core placed in the mold described with reference to Fig. 2.Alfter the molded casing 2, 3, 5, Fig. t, together' with the mold core 7is removed from the mold and the axisy Q withdrawn, the string 3 is cutat the points Where,it enters the hollow core at each end thereof, sothat the hollow member 7 i of the said core can be removed from therenter of, the casino and the core sections 8 withdrawn throngL theaperture at either end of the said casing, the casing then hemg readyfor use.

For the purpose ot strengthening the annular ribs or headings 1.0 formedat. the ups per and lo'weijends of the said casing, and t0 prevent: thewear of the said beads c011- sequentupon any slight friction which mightbe cause between the beads and the cuplile members by which the casingis retained in position on the vehicle, a layer ot canvas or the likevcan be applied on the eX- ternal surface otl the said upper and lowerbeads.

In order that tbe string', when applied to the core in the desiredmanner, shall be retained in position thereonuntil the india rubber 1smolded to complete the easing', the

said string' is ineteralny treated by coating it with an` india rubberor lilo. rulcanizable adhesive solution, prior to, or during the Windingthereof on to the core, or the core covering or casino' lining' 2 maybe. treated with india rubber or like .solution before the windinglprocess.

The term india rubber7 as hereinafter employed is intended to includealtermu, tively other like Vulcanizable material as mentioned in thetfn'enoing." description.

l/Vhat l claim as mi' inrention and desire to secure by patent is:

l. The within dtsrrila'tt process ot' manufacturing a tlexible andpractically non'eze tensible easing;1 otI appioiimately spherical form,having two diainetrically opposite openings at the top and bottom7 andhaving ribs around thesannular edges of such openings adapted to engageupper and `lower cup-lile members, said casing being for use inpneumatic cushioning devices to be located between the wheel axles andthe bodies of read vehicles: said process consisting .in amilyine' athin lining tor the casing of in dia rubber around a suitable core, thenwinding' a length ol strain-resisting string over such lining' andsimultaneously attaching; the same thereto by an adhesive coating ofindia rubber, then placing the structure in a mold, then filling' suchmold with india rubber For an outer thickness including said ribs aroundsaid string-covered structure, then vuleanizing' the casing as a whole,afterward removing the structure from the mold. and tlnally removing`the core from the flexible and noneext'ensible casing.

In the process ofmannfacturing a. tlexible and practicallynon-extensible casing ot approximately spherical form, having' twodiametrically opposite openings attop and bottom, and having ribs aroundthe annular edges of such openings adapted to en? gage upper and. lowercup-like members, said easing being for use in pneumatic cushioningdevices to belocated between the wheel axles and the bodies ot' road`rel1ieles; the method ot' introducing a continuons reinforcing stringconsisting' in applying' a thin lining` tor the casing around a.suitable core, and then winding' a continuous length of string coatedwith adhesive india rubber over such lining before Afilling the moldwith the india rubber for the outer thickness of the easingi nclndingsaid ribs, the whole beim;` adapted to be lvulcanized at one operation,whereby said string is made substantially integral with said outerthickness 0l. the india rubber.

l. The. within described process of mame :factoring a flexible andpracticallynon-extensible casingd et' approximately spherical tornihaving' two diametrically opposite openings at top and bottom and havingribs around the annular edges ot' such openings adapted to engage upperand lower cup-like members, said casing being for use in pneumaticcushioning devices to be located between the wheel' axles and the bodiesot' road vehicles; said process consist-ing inapplying a thin liningforthe casing, of indiarub-l ber, around a core having separable sectionsassembled around a hollow central member, then winding a length 'ofstringfupon said lining, said string missing through said hollow centralmember and over the exterior of ,said lining, then placing a spindlethrough said hollow member of the said st1ing-covered structure into asaid core and placing mold, then inserting india rubber for the thecasing `into said mold string-covered structure, india rubber as 'aouter thickness 0f and around said then vulcamzlng the Vuole, thenremoving the structure from the, mold, fhen cutting the String aroundsaid wponings, und finally removing the Core from the Hexble andnon-extensible casino'. f5 The foregoing specification of my mprmemen'tsin 'he mzmu'act-m'e or construcnn'n pneunmc cus 'mmHg-devices :for theLEONARD HRR S.

Witnessejsz y H. C. Com, R. Tmmo.

